DE29606938U1 - Motorcycle test bench - Google Patents

Description

The invention relates to a motorcycle test bench.

Motorcycle test benches have so far been permanently installed in workshops. For the rear wheels of motorcycles, rollers are provided whose rolling motion is overridden, whereby a basic distinction must be made between small rollers that follow the wheel and large rollers that can be equipped with appropriate brakes to simulate actual driving behavior. The large rollers have the advantage that they

1940

Bremen:

HoHcrallM 32. D-28209 Bremen P.O.B. 10 71 27, D-28071 Bremen Telephone (04 21) 3 40 90 TUefax {04 21)3 49 17 68 ■ftSKl 3 W 958 bopat &udiagr;

Munich:

Berlin-Brandenburg: Düsseldorfc

Leipzig:

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Kiel:

Telsx 524 2S2 forbo d srssas

Alicante:

Plaza Caivo Sotalo 1-2 ES-O30O1 Aiirante (Spain)

Ttltphon+34-6-598 0038 Tblefax +34-6-5980182

Due to their smaller curvature angle, they can better simulate a flat road, but have the disadvantage that they are not portable due to their size.

However, newer motorcycle test benches are not cheap, so motorcycle workshops only opt for such fixed motorcycle test benches once they reach a certain size.

Nevertheless, these workshops also have the need to test motorcycles in all their running conditions, for example to check the inertia of the speed limit of 250 km/h built into motorcycles.

Motorcycles are also often tested outside of workshops, for example at motorcycle racing events. Until now, however, it was necessary to rely on systems that had to be laboriously set up and anchored.

The invention therefore has the task of creating a motorcycle test bench that is easy to transport and can be set up quickly, whereby this test bench can test all motorcycle driving conditions.

According to the invention, this is achieved by the features of claim 1. The subclaims give advantageous embodiments of the invention.

In particular, it has been found to be advantageous to install a motorcycle test bench in a trailer so that it can be moved, however, the trailer must be able to comply with road traffic regulations and also be used by smaller vehicles.

In order to be towed by vehicles such as passenger cars, its dimensions had to be limited.

In order to be able to test powerful motorcycles up to their maximum speed, a roller with a maximum diameter was installed so that its number of revolutions is in a low range. At the same time, an eddy current brake, a so-called retarder, of sufficient power can be installed in the large free space of such a roller.

To enable road transport, the roller can be raised to a position that ensures sufficient ground clearance for the trailer. To do this, the base frame on the side of the motorcycle test bench, where a trailer coupling is attached, is pivoted apart by a hinge, with the trailer's pair of wheels remaining in a part of the base frame facing the road and the roller being raised with the main part of the base frame.

It has proven particularly advantageous to also install a vertically installed fan in the front part of the main frame, which supplies a motorcycle with enough cooling air even for high-speed operation. By installing the fan vertically, it can be ensured that it does not exceed the dimensions of a standard trailer base frame. Safety grilles attached to the side are folded up during the test process to prevent access to moving parts of the motorcycle. The motorcycle itself is anchored in the trailer frame using fastening straps.

For road transport, a ramp is placed in the rear area of the trailer as a cover over the main part of the base frame. The two parts of the base frame are spaced apart from each other by hydraulic cylinders during road transport. This provides additional suspension of the heavy roller against impacts, which may also protect other more sensitive parts of the electronics and measuring technology that are located in the upper part of the base frame in an area in front of the roller.

A large stroke on a towed part is advantageous, so it is suggested to arrange the hinge in the area of the trailer coupling.

Before being used as a test bench, the frame is folded up so that the roller is only slightly above the ground. Four height-adjustable supports arranged at the corners of the trailer allow a horizontal position to be set at any time.

Further features and advantages of the invention emerge from the following description of a preferred embodiment. It shows:

Fig. 1 the motorcycle test bench in a folded state for measuring motorcycles, and

Fig. 2 the motorcycle test bench in an unfolded state for transport.

In Fig. 1, the motorcycle test stand is shown as a trailer with a base frame provided with a drawbar 10. The drawbar is attached to the underside of a lower sub-frame 12 (Fig. 2), on which a pair of wheels 14 is also arranged. In the rear area of the trailer there is a ramp 16, which serves as a cover on the top of the motorcycle test stand when driving on the road. This ramp is advantageously divided into two parts, with two parts that can be pivoted together about a joint 18. Reference number 20 designates a ramp hinge on each rear corner of the upper part of the base frame, which is raised compared to the end edge of the base frame, so that the pivoted-up ramp 16 leaves a certain amount of free space on the top of the base frame. This free space serves to accommodate the part of the roller that protrudes slightly above the top.

A retarder 26 is provided within the roller 22, which is also mounted on the upper section of the base frame and is advantageously located in a corresponding recess in the roller 22. The roller 22 is preferably a tractor rim, which due to its size of 900 mm diameter only rotates at a low peripheral speed.

In the front part of the upper section 30 of the frame, a vertically installed cooling fan is provided, in which an electric motor 36 sucks in air through a large intake port 60 and directs it via an air baffle 34 onto the engine of the motorcycle to be tested. The intake from below means that no disturbing air draft is generated around the test stand.

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The front wheel of the motorcycle is attached to a longitudinally movable safety device that can be locked on a perforated rail and adjusted using a crank. Fastening straps are lashed over the motorcycle, the points of attachment of which on the test bench frame can be adjusted along the longitudinal outer edges using parts that can be moved in a helmet rail. Support feet 42 are provided at the corners of the base frame and can be lowered using cranks 40. A position 44 in which these support feet are lowered is indicated in dashed lines.

Furthermore, reference number 4 6 designates a hydraulic cylinder which separates the two sections of the base frame from each other and ensures good suspension of the upper section during road traffic. In front of the support roller there is a free space 32 as storage space for a detachable control station on which the data to be checked is displayed. The data is recorded in particular via a measuring cell 48 on the retarder and via a speed sensor 50.

Furthermore, reference numeral 52 indicates the side railings that can be folded onto the trailer base frame and are preferably pivotably attached to the helmet rail, and reference numeral 54 indicates the hinge around which the two base frame halves can be pivoted against each other.

Claims (9)

BOEHMEftf &Iacgr;:" E 5045 CLAIMS 1. Motorcycle test stand with a roller (22) for the driven rear wheel of a motorcycle, characterized in that the roller (22) is arranged in a divisible base frame, one part having the wheels (14) of a trailer and an upper part being pivotable against this lower part and holding the roller (22). 2. Motorcycle test bench according to claim 1, characterized in that a hinge (54) for pivoting the two parts of the base frame is arranged on the (front) side of a trailer, on which a trailer coupling is also located. 3. Motorcycle test bench according to one of the preceding claims, characterized in that the roller (22) is a permanently installed tractor rim and a front wheel catch (38) on the top of the base frame is adjustable in its distance from the tractor rim (22). 4. Motorcycle test bench according to one of the preceding claims, characterized by an eddy current retarder (26) in the cavity of the rim. BOEH^ERT& B 5. Motorcycle test bench according to one of the preceding claims, characterized by fastening straps which are arranged in a helmet rail so as to be displaceable along the long sides of the upper edge of the base frame. 6. Motorcycle test bench according to one of the preceding claims, characterized by a vertically installed fan (36, SO), the cooling air of which is directed by a deflection device (34) onto the engine of the motorcycle to be tested. 7. Motorcycle test bench according to one of the preceding claims, characterized by safety grilles (52) which are hingedly attached to the helmet rail. 8. Motorcycle test bench according to one of the preceding claims, characterized by a loading ramp (16, 18) in the rear area on the top side of the upper part with a swivel joint (20) attached to the loading ramp. 9. Motorcycle test bench according to one of the preceding claims, characterized by hydraulic cylinders (46) between the base frame parts for spring mounting during road transport.